tectonic hazards

Question 1

why do tectonic plates move

Answer 1

convection currents

Question 2

describe continental crust

Answer 2

thick ( 30-50km)
less dense

Question 3

describe oceanic crust

Answer 3

thin (5-10km)
more dense

Question 4

what are destructive plate margins

Answer 4

two plates are moving towards eachother

Question 5

what happens when an oceanic plate meets a continental plate ( destructive plate margin )

Answer 5

the denser oceanic plate is subducted under the continental plate and is destroyed into magma

Question 6

what happens when two continental plates meet ( destructive plate margin)

Answer 6

the ground is folded upwards creating fold mountains

Question 7

what is a constructive plate margin

Answer 7

where two plates move away from eachother, magma rises from the mantle to fill the gap creating new crust

Question 8

what are conservative plate margins

Answer 8

where two plates move sideways past eachother or moving the same direction at different speeds
- crust is neither destroyed or created

Question 9

which plate margins can volcanoes occur at

Answer 9

destructive and constructive

Question 10

which plate margins do earthquakes occur at

Answer 10

destructive, constructive and conservative

Question 11

key information about the Gorkha earthquake in nepal
- date
- plate boundary
- GDP
- magnitude

Answer 11

• 25th of April 2015
• destructive plate boundary, indo australian plate is being subducted under the eurasian plate
• $690
• 7.8

Question 12

primary effects of the Ghorka earthquake

Answer 12

• 9000 deaths and 22000 injuries
• 800000 buildings were destroyed
• 4 million were left homeless
• cost of damage was $5 billion
• water tanks and pipes were destroyed leaving 2 million people without clean water

Question 13

secondary effects of the Ghorka earthquake

Answer 13

• the earthquake triggered avalanches on mount Everest which killed 18 people
• many roads were blocked by landslides preventing emergency aid from reaching remote areas
• a lack of clean water caused outbreaks of typhus which killed 13 people

Question 14

immediate responses of Ghorka earthquake

Answer 14

• india and china sent out teams to help people trapped by debris
• Charities such as Oxfam provided medicine, food and temporary water supplies
• red cross set up emergency shelters for 130,000 families